{"id":477788,"date":"2023-08-09T09:20:26","date_gmt":"2023-08-09T09:20:26","guid":{"rendered":""},"modified":"2023-09-05T11:15:25","modified_gmt":"2023-09-05T11:15:25","slug":"krack-attack","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/fr\/wiki\/krack-attack\/","title":{"rendered":"Attaque de KRACK"},"content":{"rendered":"<p>Br\u00e8ves informations sur l&#039;attaque KRACK<\/p>\n<p>L&#039;attaque de r\u00e9installation de cl\u00e9, ou KRACK Attack, est une grave faiblesse du protocole WPA2 qui s\u00e9curise la plupart des r\u00e9seaux Wi-Fi prot\u00e9g\u00e9s modernes. Il permet \u00e0 un attaquant \u00e0 port\u00e9e d\u2019une victime de pirater des informations suppos\u00e9es \u00eatre crypt\u00e9es de mani\u00e8re s\u00e9curis\u00e9e. L&#039;attaque manipule les vuln\u00e9rabilit\u00e9s dans le fonctionnement des poign\u00e9es de main Wi-Fi, rendant les informations sensibles telles que les num\u00e9ros de carte de cr\u00e9dit, les mots de passe et les messages de discussion susceptibles d&#039;\u00eatre intercept\u00e9es.<\/p>\n<h2>L&#039;histoire de l&#039;origine de l&#039;attaque KRACK et sa premi\u00e8re mention<\/h2>\n<p>L&#039;attaque KRACK a \u00e9t\u00e9 d\u00e9couverte pour la premi\u00e8re fois par les chercheurs belges Mathy Vanhoef et Frank Piessens de la KU Leuven en 2016. Ils ont officiellement annonc\u00e9 leurs d\u00e9couvertes en octobre 2017, envoyant une onde de choc dans la communaut\u00e9 technologique en raison de la d\u00e9pendance g\u00e9n\u00e9ralis\u00e9e au protocole WPA2 pour les connexions Wi-Fi s\u00e9curis\u00e9es.<\/p>\n<h2>Informations d\u00e9taill\u00e9es sur KRACK Attack\u00a0: extension du sujet KRACK Attack<\/h2>\n<p>L\u2019attaque KRACK ne cible pas une vuln\u00e9rabilit\u00e9 sp\u00e9cifique d\u2019un appareil ou d\u2019un logiciel particulier, mais expose plut\u00f4t une faille dans la conception du protocole WPA2 lui-m\u00eame. L\u2019attaque cible la n\u00e9gociation \u00e0 quatre qui se produit entre un appareil et un routeur lorsqu\u2019ils \u00e9tablissent une connexion Wi-Fi.<\/p>\n<h3>Poign\u00e9e de main \u00e0 quatre\u00a0:<\/h3>\n<ol>\n<li><strong>Authentification client\u00a0:<\/strong> Le client prouve qu&#039;il conna\u00eet le mot de passe du r\u00e9seau.<\/li>\n<li><strong>D\u00e9rivation cl\u00e9\u00a0:<\/strong> Les deux parties d\u00e9rivent une cl\u00e9 partag\u00e9e pour chiffrer les donn\u00e9es.<\/li>\n<li><strong>Confirmation:<\/strong> Les parties confirment la possession de la m\u00eame cl\u00e9.<\/li>\n<li><strong>Connexion:<\/strong> Connexion s\u00e9curis\u00e9e \u00e9tablie.<\/li>\n<\/ol>\n<p>L&#039;attaque KRACK interf\u00e8re avec cette prise de contact, for\u00e7ant la r\u00e9installation des cl\u00e9s, ce qui conduit \u00e0 la r\u00e9utilisation des cl\u00e9s cryptographiques, compromettant le cryptage des donn\u00e9es.<\/p>\n<h2>La structure interne de l&#039;attaque KRACK\u00a0: comment fonctionne l&#039;attaque KRACK<\/h2>\n<p>L\u2019attaque KRACK affecte principalement la troisi\u00e8me \u00e9tape de la poign\u00e9e de main \u00e0 quatre. L&#039;attaquant force la retransmission du message 3 de la poign\u00e9e de main, obligeant le client \u00e0 r\u00e9installer une cl\u00e9 d\u00e9j\u00e0 utilis\u00e9e, r\u00e9initialisant les param\u00e8tres associ\u00e9s. Voici un guide \u00e9tape par \u00e9tape\u00a0:<\/p>\n<ol>\n<li><strong>Interception:<\/strong> L&#039;attaquant intercepte la poign\u00e9e de main entre le client et l&#039;AP (Access Point).<\/li>\n<li><strong>D\u00e9cryptage :<\/strong> L&#039;attaquant d\u00e9crypte le message.<\/li>\n<li><strong>Renvoi\u00a0:<\/strong> L&#039;attaquant renvoie le message 3, obligeant le client \u00e0 r\u00e9installer la cl\u00e9.<\/li>\n<li><strong>Capture de donn\u00e9es:<\/strong> L&#039;attaquant peut d\u00e9sormais capturer et manipuler des donn\u00e9es.<\/li>\n<\/ol>\n<h2>Analyse des principales caract\u00e9ristiques de KRACK Attack<\/h2>\n<ul>\n<li><strong>Applicabilit\u00e9 universelle\u00a0:<\/strong> Cela affecte presque tous les appareils utilisant WPA2.<\/li>\n<li><strong>Manipulation du trafic crypt\u00e9\u00a0:<\/strong> Permet aux attaquants de d\u00e9chiffrer, de rejouer et de falsifier des paquets.<\/li>\n<li><strong>Aucune exigence de mot de passe\u00a0:<\/strong> Il ne n\u00e9cessite pas d&#039;acc\u00e8s au mot de passe Wi-Fi.<\/li>\n<\/ul>\n<h2>Types d\u2019attaques KRACK\u00a0: un aper\u00e7u<\/h2>\n<table>\n<thead>\n<tr>\n<th>Une variante<\/th>\n<th>Cible<\/th>\n<th>Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>R\u00e9installation de la cl\u00e9<\/td>\n<td>Client\u00e8le<\/td>\n<td>Cible le processus de prise de contact c\u00f4t\u00e9 client.<\/td>\n<\/tr>\n<tr>\n<td>Attaque de cl\u00e9 de groupe<\/td>\n<td>R\u00e9seau<\/td>\n<td>Cible les cl\u00e9s de groupe utilis\u00e9es dans un r\u00e9seau.<\/td>\n<\/tr>\n<tr>\n<td>Attaque PeerKey<\/td>\n<td>Appareils homologues<\/td>\n<td>Cible la poign\u00e9e de main entre les appareils du m\u00eame r\u00e9seau<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Fa\u00e7ons d&#039;utiliser l&#039;attaque KRACK, probl\u00e8mes et leurs solutions li\u00e9es \u00e0 l&#039;utilisation<\/h2>\n<h3>Fa\u00e7ons d&#039;utiliser\u00a0:<\/h3>\n<ul>\n<li><strong>Le vol de donn\u00e9es:<\/strong> Voler des informations personnelles ou financi\u00e8res.<\/li>\n<li><strong>Manipulation du r\u00e9seau\u00a0:<\/strong> Injecter du contenu malveillant dans des sites Web.<\/li>\n<\/ul>\n<h3>Probl\u00e8mes:<\/h3>\n<ul>\n<li><strong>Impact g\u00e9n\u00e9ralis\u00e9\u00a0:<\/strong> Affecte un grand nombre d\u2019appareils.<\/li>\n<li><strong>Att\u00e9nuation complexe\u00a0:<\/strong> N\u00e9cessite des mises \u00e0 jour des appareils clients et des points d\u2019acc\u00e8s.<\/li>\n<\/ul>\n<h3>Solutions:<\/h3>\n<ul>\n<li><strong>Correctif\u00a0:<\/strong> Mettez r\u00e9guli\u00e8rement \u00e0 jour les appareils et les routeurs.<\/li>\n<li><strong>En utilisant HTTPS\u00a0:<\/strong> Garantissez le cryptage de bout en bout des informations sensibles.<\/li>\n<\/ul>\n<h2>Principales caract\u00e9ristiques et autres comparaisons avec des termes similaires<\/h2>\n<table>\n<thead>\n<tr>\n<th>Fonctionnalit\u00e9<\/th>\n<th>Attaque de KRACK<\/th>\n<th>Autres attaques Wi-Fi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Cible<\/td>\n<td>WPA2<\/td>\n<td>WEP, WPA<\/td>\n<\/tr>\n<tr>\n<td>M\u00e9thode<\/td>\n<td>Poign\u00e9e de main<\/td>\n<td>Craquage de mot de passe<\/td>\n<\/tr>\n<tr>\n<td>Impact<\/td>\n<td>Universel<\/td>\n<td>Souvent sp\u00e9cifique \u00e0 l&#039;appareil<\/td>\n<\/tr>\n<tr>\n<td>Att\u00e9nuation<\/td>\n<td>Correction<\/td>\n<td>Changer les protocoles<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Perspectives et technologies du futur li\u00e9es \u00e0 l&#039;attaque KRACK<\/h2>\n<p>La d\u00e9couverte de KRACK a conduit \u00e0 de s\u00e9rieuses discussions et \u00e0 l&#039;\u00e9volution des normes de s\u00e9curit\u00e9 sans fil. Le protocole WPA3, introduit en 2018, offre des mesures de s\u00e9curit\u00e9 renforc\u00e9es et att\u00e9nue l&#039;impact de KRACK.<\/p>\n<h2>Comment les serveurs proxy peuvent \u00eatre utilis\u00e9s ou associ\u00e9s \u00e0 l&#039;attaque KRACK<\/h2>\n<p>Les serveurs proxy comme ceux fournis par OneProxy peuvent offrir une couche de s\u00e9curit\u00e9 suppl\u00e9mentaire contre les attaques KRACK. En acheminant le trafic via un canal s\u00e9curis\u00e9 et crypt\u00e9, les serveurs proxy peuvent contribuer \u00e0 r\u00e9duire le risque d&#039;interception de donn\u00e9es, m\u00eame si le protocole WPA2 est compromis.<\/p>\n<h2>Liens connexes<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.krackattacks.com\/\" target=\"_new\" rel=\"noopener nofollow\">Site officiel de l&#039;attaque KRACK<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/fr\/\" target=\"_new\" rel=\"noopener\">Solutions de proxy s\u00e9curis\u00e9 de OneProxy<\/a><\/li>\n<li><a href=\"https:\/\/www.wi-fi.org\/discover-wi-fi\/security\" target=\"_new\" rel=\"noopener nofollow\">Alliance Wi-Fi sur la s\u00e9curit\u00e9 WPA3<\/a><\/li>\n<\/ul>\n<hr>\n<p><em>Remarque\u00a0: consultez toujours des experts professionnels en cybers\u00e9curit\u00e9 et maintenez vos syst\u00e8mes \u00e0 jour pour vous prot\u00e9ger contre KRACK et d&#039;autres vuln\u00e9rabilit\u00e9s.<\/em><\/p>","protected":false},"featured_media":477789,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477788","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>KRACK Attack: Understanding Key Reinstallation Attacks<\/mark>","faq_items":[{"question":"What is the KRACK Attack?","answer":"<p>The KRACK Attack, or Key Reinstallation Attack, is a vulnerability in the WPA2 protocol that secures many Wi-Fi networks. It allows an attacker within range to intercept information that was previously assumed to be securely encrypted.<\/p>"},{"question":"When was the KRACK Attack discovered?","answer":"<p>The KRACK Attack was discovered by Belgian researchers Mathy Vanhoef and Frank Piessens in 2016 and officially announced in October 2017.<\/p>"},{"question":"How does the KRACK Attack work?","answer":"<p>The KRACK Attack interferes with the four-way handshake between a device and a router that establishes a Wi-Fi connection. It forces the retransmission of message 3, causing the client to reinstall an already-used key, thus allowing the attacker to capture and manipulate data.<\/p>"},{"question":"What types of devices are affected by the KRACK Attack?","answer":"<p>Almost any device that uses the WPA2 protocol for secure Wi-Fi connections can be affected by the KRACK Attack. This includes smartphones, laptops, routers, and more.<\/p>"},{"question":"What are the key features of the KRACK Attack?","answer":"<p>The key features of the KRACK Attack include its universal applicability, the ability to manipulate encrypted traffic, and the fact that it does not require knowledge of the Wi-Fi password.<\/p>"},{"question":"How can one protect against the KRACK Attack?","answer":"<p>Protection against the KRACK Attack involves regularly updating devices and routers with security patches, using HTTPS for end-to-end encryption, and considering additional security measures such as proxy servers like OneProxy.<\/p>"},{"question":"What are the future perspectives related to KRACK Attack?","answer":"<p>The discovery of KRACK has led to developments in wireless security standards, such as the introduction of the WPA3 protocol in 2018, offering enhanced security measures that mitigate the impact of KRACK.<\/p>"},{"question":"How can proxy servers be associated with KRACK Attack?","answer":"<p>Proxy servers, like those provided by OneProxy, offer an additional layer of security against KRACK attacks by routing traffic through a secure and encrypted channel, thereby reducing the risk of data being intercepted.<\/p>"},{"question":"Are there different types of KRACK Attacks?","answer":"<p>Yes, there are different variants of KRACK Attacks, including key reinstallation attacks targeting clients, group key attacks targeting networks, and PeerKey attacks targeting peer devices within the same network.<\/p>"},{"question":"Where can I find more information about KRACK Attack?","answer":"<p>More information about the KRACK Attack can be found on the official KRACK Attack website, and for solutions on securing your connections, you can visit OneProxy's website.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/fr\/wp-json\/wp\/v2\/wiki\/477788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/fr\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/fr\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/fr\/wp-json\/wp\/v2\/wiki\/477788\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/fr\/wp-json\/wp\/v2\/media\/477789"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/fr\/wp-json\/wp\/v2\/media?parent=477788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}